Residents awake to early morning 'high risk' sheriff activity

Aerial view of the house where Marin County Sheriff deputies attempt to issue a "high risk" search warrant on Friday morning, August 22, 2014.

Friday, August 22, 2014

SAN ANSELMO, Calif. (KGO) --

Some San Anselmo residents were told to evacuate or shelter-in-place Friday morning as sheriff's deputies tried to serve a "high-risk" search warrant.

Marin County Sheriff's deputies moved in on a house at 30 Oak Knoll Drive in the Sleepy Hallow neighborhood at 6 a.m. Several deputies and a mobile command unit were stationed at the entrance of the community and more officers gathered at the fire station on Butterfield Road. "I've never seen that before," one passerby said.

But when officers got to the house, no one was home.

The option for neighbors to evacuate or shelter-in-place was issued as a precaution. Authorities did not release any details about the warrant or why it was considered high-risk.